Bulletin d’avalanche

South Rockies

Jan 1 – 2, 2014Avalanche Canada
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Archivé · expiré 13 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Wind slabs that formed over the past couple of days are likely limited to the immediate leeward side of ridge crests, but widespread fresh touchy wind slabs are expected to start forming Thursday afternoon.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–5
    A persistent weakness buried late-November is primed for human-triggered avalanches primarily in the Flathead and Elk Valley South areas.

Confidence

Fair - Intensity of incoming weather systems is uncertain on Thursday

Weather Forecast

Thursday: Cloudy with flurries increasing in intensity throughout the day with 10-15cm of accumulation by Friday morning. Freezing levels in valley bottoms and alpine winds increasing to strong southwesterlies by the evening. Friday: Snow with another 5-10cm of accumulation (or more east of the divide), light to moderate northerly alpine winds and freezing levels in valley bottoms Saturday: Mostly cloudy with isolated flurries, moderate northwesterly alpine winds and treeline temperatures around -10.

Avalanche Summary

No recent avalanches have been reported. Ski cutting on Tuesday near Crowsnest Pass produced no results.

Snowpack Summary

Alpine areas are highly wind-affected with scoured areas, sastrugi, and deep deposits. At treeline, the snowpack is generally well settled, but definitely more stable in the Crowsnest and Elk Valley North than in the Flathead and Elk Valley South where the late-November persistent weakness of surface hoar, crust, and/or facets down 30-70cm has reached the tipping point for rider triggering in a few areas. Check out this video of a recent snowpack test on this layer.

Régions couvertes